the rest of science, we'll apply it, follow where the data leav donaytonon' data leads, we'll leave the politics after the door. >> and sometimes this is contaminated. the pure drug can cause problems, people can actually die from drinking too much water. but in a controlled setting which is what we're talking about here, the evidence does seem to suggest it can be safe. similar studies are under way in europe and canada, and the doctor is studying the treatment to combat veterans, firefighters and police officers. dr. sanjay gupta, cnn, reporting. >> very interesting, dr. gupta, thank you. >>> and we're celebrating everyday people changing the word. up next, you will hear from a texas man who builds homes for wounded veterans. coming up. cleaner energy, while protecting our environment. across america, these technologies protect air - by monitoring air quality and reducing emissions... ...protect water - through conservation and self-contained recycling systems... ... and protect land - by reducing our footprint and respecting wildlife. america's natural gas... domestic, abundant,
